/* ============================================================
   Navigating the AI Era · 领航十一期 · Team GOAT
   ============================================================ */

:root {
  /* Surfaces — deep, cool, layered */
  --bg-0: #05060B;            /* deepest */
  --bg-1: #0A0C16;            /* base */
  --bg-2: #0F1322;            /* elevated */
  --bg-3: #161B2E;            /* card */

  /* Text */
  --text-0: #F5F6FA;          /* primary */
  --text-1: #C8CBD9;          /* body */
  --text-2: #8A8FA3;          /* muted */
  --text-3: #5A5F73;          /* faint */

  /* Borders & lines */
  --line-0: rgba(255,255,255,0.08);
  --line-1: rgba(255,255,255,0.12);
  --line-strong: rgba(255,255,255,0.20);

  /* Accents — cool aurora palette */
  --accent-violet: #8B7CFF;
  --accent-blue:   #4D8BFF;
  --accent-cyan:   #5EE4D5;
  --accent-warm:   #FFB37A;    /* used sparingly for human warmth */

  /* Gradient stops for aurora */
  --aurora-1: rgba(139, 124, 255, 0.55);  /* violet */
  --aurora-2: rgba(77,  139, 255, 0.45);  /* blue */
  --aurora-3: rgba(94,  228, 213, 0.35);  /* cyan */

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.035);
  --glass-stroke: rgba(255, 255, 255, 0.10);

  /* Type scale */
  --font-display: "Instrument Serif", "Source Serif 4", "Noto Serif SC", Georgia, serif;
  --font-sans: "Inter", "Noto Sans SC", -apple-system, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Berkeley Mono", Consolas, monospace;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Easing */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
*::selection { background: rgba(139, 124, 255, 0.35); color: var(--text-0); }

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg-0);
  color: var(--text-1);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

/* ============== Top nav ============== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 18px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(180deg, rgba(5,6,11,0.75), rgba(5,6,11,0));
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: padding 0.4s var(--ease-out), background 0.4s var(--ease-out);
}
.nav.scrolled { padding: 12px 32px; background: rgba(5,6,11,0.7); border-bottom: 1px solid var(--line-0); }
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-1);
}
.nav-logo svg { width: 22px; height: 22px; }
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  font-size: 12.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-2);
  transition: color 0.2s var(--ease-out);
}
.nav-links a:hover { color: var(--text-0); }
@media (max-width: 720px) {
  .nav-links { display: none; }
}

/* ============== Section frame ============== */
section {
  position: relative;
  padding: clamp(80px, 14vh, 160px) 32px;
  overflow: hidden;
}
.container { max-width: 1180px; margin: 0 auto; }
.container--narrow { max-width: 880px; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--text-2);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 24px; height: 1px;
  background: linear-gradient(90deg, var(--accent-violet), var(--accent-cyan));
}

.section-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(34px, 5.2vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text-0);
  margin-bottom: 18px;
}
.section-subtitle {
  font-size: clamp(15px, 1.4vw, 18px);
  color: var(--text-2);
  max-width: 640px;
  margin-bottom: 56px;
  line-height: 1.6;
}

/* ============== HERO ============== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 32px 80px;
}
.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero-aurora {
  position: absolute;
  inset: -10%;
  background:
    radial-gradient(40% 35% at 20% 30%, var(--aurora-1) 0%, transparent 60%),
    radial-gradient(45% 40% at 80% 25%, var(--aurora-2) 0%, transparent 65%),
    radial-gradient(38% 32% at 50% 80%, var(--aurora-3) 0%, transparent 60%);
  filter: blur(20px);
  opacity: 0.55;
  animation: auroraDrift 22s ease-in-out infinite alternate;
}
@keyframes auroraDrift {
  0%   { transform: translate3d(-2%, -1%, 0) scale(1); }
  50%  { transform: translate3d(2%, 1%, 0) scale(1.05); }
  100% { transform: translate3d(-1%, 2%, 0) scale(0.98); }
}
.hero-grain {
  position: absolute;
  inset: 0;
  opacity: 0.5;
  mix-blend-mode: overlay;
  pointer-events: none;
  background-image:
    radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
    radial-gradient(rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 3px 3px, 7px 7px;
  background-position: 0 0, 1px 1px;
}

.hero-inner { position: relative; z-index: 1; max-width: 920px; }
.hero-qr {
  position: absolute;
  top: 96px;
  right: clamp(24px, 5vw, 72px);
  z-index: 2;
  width: clamp(96px, 9vw, 132px);
  aspect-ratio: 1 / 1;
  padding: 8px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid rgba(255,255,255,0.28);
  box-shadow: 0 18px 54px rgba(0,0,0,0.34), 0 0 0 1px rgba(5,6,11,0.20);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}
.hero-qr:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 64px rgba(0,0,0,0.40), 0 0 26px rgba(94,228,213,0.18);
}
.hero-qr img {
  width: 100%;
  height: 100%;
  border-radius: 11px;
  object-fit: cover;
}
.hero-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.30em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 24px;
}
.hero-kicker span { color: var(--accent-cyan); }
.hero-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(52px, 9vw, 116px);
  line-height: 1.0;
  letter-spacing: -0.02em;
  color: var(--text-0);
  margin-bottom: 14px;
}
.hero-title-zh {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 400;
  color: var(--text-1);
  letter-spacing: 0.06em;
  margin-bottom: 28px;
}
.hero-title-zh::before, .hero-title-zh::after {
  content: "·";
  margin: 0 14px;
  color: var(--text-3);
}
.hero-sub {
  font-size: clamp(16px, 1.5vw, 19px);
  color: var(--text-1);
  max-width: 620px;
  margin: 0 auto 22px;
  line-height: 1.6;
}
.hero-body {
  font-size: 15px;
  color: var(--text-2);
  max-width: 560px;
  margin: 0 auto 48px;
  white-space: pre-line;
  text-wrap: balance;
  line-height: 1.75;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  background: var(--text-0);
  color: var(--bg-0);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
  box-shadow: 0 0 0 0 rgba(139, 124, 255, 0);
}
.hero-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 40px -10px rgba(139, 124, 255, 0.6);
}
.hero-cta svg { width: 14px; height: 14px; }

.hero-scroll-hint {
  position: absolute;
  bottom: 32px; left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.30em;
  text-transform: uppercase;
  color: var(--text-3);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  z-index: 1;
}
.hero-scroll-hint::after {
  content: "";
  width: 1px; height: 28px;
  background: linear-gradient(180deg, var(--text-3), transparent);
  animation: scrollPulse 2.2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ============== JOURNEY TIMELINE ============== */
.journey { background: var(--bg-0); }
.journey-track {
  position: relative;
  margin-top: 32px;
  padding-left: 60px;
}
.journey-track::before {
  content: "";
  position: absolute;
  top: 12px; bottom: 12px;
  left: 24px;
  width: 1px;
  background: linear-gradient(180deg,
    transparent 0%,
    var(--accent-violet) 8%,
    var(--accent-blue) 40%,
    var(--accent-cyan) 75%,
    transparent 100%);
  opacity: 0.6;
}
.journey-step {
  position: relative;
  padding: 28px 0 28px 12px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.journey-step.in { opacity: 1; transform: none; }
.journey-step::before {
  content: "";
  position: absolute;
  left: -42px;
  top: 36px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--bg-0);
  border: 1.5px solid var(--accent-blue);
  box-shadow: 0 0 0 4px rgba(77, 139, 255, 0.10), 0 0 18px var(--accent-blue);
}
.journey-step .meta {
  display: flex; gap: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 10px;
}
.journey-step .meta .date { color: var(--accent-cyan); }
.journey-step h3 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--text-0);
  margin-bottom: 4px;
}
.journey-step .titleEN {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 0.10em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.journey-step p {
  font-size: 15px;
  color: var(--text-1);
  max-width: 640px;
  line-height: 1.7;
}

/* ============== MEMBER SPOTLIGHT ============== */
.spotlight { background: var(--bg-1); }
.spotlight-stage {
  position: relative;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 56px;
  align-items: stretch;
  margin-top: 32px;
}
@media (max-width: 880px) {
  .spotlight-stage { grid-template-columns: 1fr; gap: 24px; }
}

.spotlight-avatar {
  width: 100%;
  align-self: start;
  aspect-ratio: 1 / 1;
  border-radius: 24px;
  position: relative;
  overflow: hidden;
  background: var(--bg-3);
  border: 1px solid var(--glass-stroke);
  transition: opacity 0.5s var(--ease-out);
}
.spotlight-avatar::after {
  content: "";
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, transparent 48%, rgba(5,6,11,0.32) 100%),
    radial-gradient(circle at 30% 30%, rgba(255,255,255,0.12), transparent 60%);
  pointer-events: none;
  z-index: 1;
}
.spotlight-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.02);
  transition: opacity 0.5s var(--ease-out), transform 0.8s var(--ease-out);
}
.spotlight-avatar.has-photo .spotlight-photo {
  opacity: 1;
  transform: scale(1);
}
.spotlight-avatar-initials {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: clamp(54px, 7vw, 88px);
  font-weight: 400;
  color: var(--text-0);
  letter-spacing: -0.02em;
  z-index: 2;
  transition: opacity 0.35s var(--ease-out);
}
.spotlight-avatar.has-photo .spotlight-avatar-initials { opacity: 0; }

.spotlight-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-stroke);
  border-radius: 24px;
  padding: 40px 40px 32px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: relative;
  min-height: 430px;
  display: flex;
  flex-direction: column;
}
.spotlight-card::before {
  content: "";
  position: absolute; inset: 0;
  border-radius: 24px;
  background: linear-gradient(135deg,
    rgba(139,124,255,0.08) 0%,
    transparent 40%,
    rgba(94,228,213,0.06) 100%);
  pointer-events: none;
  z-index: 0;
}
.spotlight-card > * { position: relative; z-index: 1; }
.spotlight-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.spotlight-name {
  font-family: var(--font-display);
  font-size: clamp(34px, 4.2vw, 48px);
  font-weight: 400;
  color: var(--text-0);
  line-height: 1.0;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
  transition: opacity 0.35s var(--ease-out);
}
.spotlight-name .zh {
  font-size: 0.55em;
  color: var(--text-2);
  margin-left: 14px;
  font-family: var(--font-display);
}
.spotlight-role {
  font-size: 13px;
  color: var(--text-2);
  letter-spacing: 0.04em;
}
.spotlight-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  padding: 6px 12px;
  border: 1px solid rgba(94,228,213,0.30);
  border-radius: 999px;
  background: rgba(94,228,213,0.05);
  white-space: nowrap;
}

.spotlight-keyword {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 8px;
}
.spotlight-takeaway {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 400;
  color: var(--text-0);
  line-height: 1.45;
  margin-bottom: 28px;
  letter-spacing: -0.005em;
  min-height: 112px;
}
.spotlight-takeaway::before { content: "「"; color: var(--text-3); margin-right: 2px; }
.spotlight-takeaway::after { content: "」"; color: var(--text-3); margin-left: 2px; }

.spotlight-next {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 20px;
  border-top: 1px solid var(--line-0);
  margin-top: auto;
}
.spotlight-next-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--text-3);
}
.spotlight-next-text {
  font-size: 15px;
  color: var(--text-1);
  line-height: 1.5;
  min-height: 46px;
}

@media (max-width: 880px) {
  .spotlight-card { min-height: 500px; }
  .spotlight-takeaway { min-height: 146px; }
}

/* Controls */
.spotlight-controls {
  margin-top: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.spotlight-progress {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 14px;
}
.spotlight-progress-track {
  flex: 1;
  height: 2px;
  background: var(--line-0);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}
.spotlight-progress-fill {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--accent-violet), var(--accent-cyan));
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.6s var(--ease-out);
}
.spotlight-counter {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-2);
  letter-spacing: 0.05em;
  font-variant-numeric: tabular-nums;
  min-width: 56px;
  text-align: right;
}
.spotlight-buttons { display: flex; gap: 10px; align-items: center; }
.btn-icon {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--glass-stroke);
  background: var(--glass-bg);
  color: var(--text-1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.25s var(--ease-out);
}
.btn-icon:hover { color: var(--text-0); border-color: var(--accent-cyan); background: rgba(94,228,213,0.06); }
.btn-icon svg { width: 16px; height: 16px; }
.btn-autoplay {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-2);
  padding: 12px 18px;
  border: 1px solid var(--glass-stroke);
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.25s var(--ease-out);
}
.btn-autoplay:hover { color: var(--text-0); border-color: var(--accent-cyan); }
.btn-autoplay.active { color: var(--accent-cyan); border-color: var(--accent-cyan); }
.btn-autoplay .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--text-3);
}
.btn-autoplay.active .dot {
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
}

.spotlight-thumbs {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 8px;
}
@media (max-width: 720px) {
  .spotlight-thumbs { grid-template-columns: repeat(5, 1fr); }
}
.thumb {
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  border: 1px solid var(--line-0);
  background: var(--bg-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.25s var(--ease-out);
  position: relative;
  overflow: hidden;
}
.thumb:hover { border-color: var(--line-strong); color: var(--text-0); }
.thumb.active {
  border-color: transparent;
  color: var(--text-0);
}
.thumb.active::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(135deg, var(--accent-violet), var(--accent-blue) 60%, var(--accent-cyan));
  opacity: 0.85;
  z-index: 0;
}
.thumb span { position: relative; z-index: 1; }

/* spotlight-hint above name */
.spotlight-hint {
  position: absolute;
  top: -14px;
  right: 24px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--bg-1);
  background: linear-gradient(135deg, var(--accent-violet), var(--accent-cyan));
  padding: 6px 12px;
  border-radius: 999px;
  z-index: 2;
}

/* ============== MENTOR THANKS ============== */
.mentors {
  background: linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 100%);
  overflow: hidden;
}
.mentors-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(42% 34% at 22% 22%, rgba(94,228,213,0.10), transparent 70%),
    radial-gradient(40% 38% at 78% 62%, rgba(139,124,255,0.12), transparent 72%),
    linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.035) 50%, transparent 100%);
}
.mentors .container {
  position: relative;
}
.mentors-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}
.mentor-card {
  position: relative;
  min-height: 292px;
  padding: 26px 22px 24px;
  border: 1px solid var(--glass-stroke);
  border-radius: 22px;
  background:
    linear-gradient(145deg, rgba(255,255,255,0.075), rgba(255,255,255,0.032)),
    radial-gradient(circle at 50% 0%, rgba(94,228,213,0.08), transparent 54%);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  overflow: hidden;
}
.mentor-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(
    135deg,
    rgba(139,124,255,0.11) 0%,
    transparent 42%,
    rgba(94,228,213,0.08) 100%
  );
  pointer-events: none;
}
.mentor-card > * {
  position: relative;
  z-index: 1;
}
.mentor-index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: 0.18em;
  margin-bottom: 30px;
}
.mentor-orbit {
  width: 74px;
  height: 74px;
  border: 1px solid rgba(94,228,213,0.26);
  border-radius: 50%;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  background: rgba(94,228,213,0.045);
  box-shadow: 0 0 32px rgba(94,228,213,0.08);
}
.mentor-orbit span {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 25px;
  color: var(--text-0);
  background: linear-gradient(135deg, var(--accent-violet), var(--accent-cyan));
}
.mentor-card h3 {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 400;
  color: var(--text-0);
  line-height: 1.05;
  margin-bottom: 14px;
}
.mentor-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-1);
}
.mentors-note {
  max-width: 780px;
  margin: 34px auto 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.2vw, 28px);
  line-height: 1.5;
  color: var(--text-0);
  text-align: center;
}
@media (max-width: 980px) {
  .mentors-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 560px) {
  .mentors-grid {
    grid-template-columns: 1fr;
  }
  .mentor-card {
    min-height: 250px;
  }
}

/* ============== COLLECTIVE REFLECTION ============== */
.reflection { background: var(--bg-1); }
.reflection-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
  margin-top: 32px;
}
@media (max-width: 880px) {
  .reflection-grid { grid-template-columns: 1fr; gap: 32px; }
}
.reflection-cloud {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.reflection-cloud .kw {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--line-1);
  background: var(--glass-bg);
  font-family: var(--font-display);
  color: var(--text-0);
  letter-spacing: 0.01em;
  transition: all 0.4s var(--ease-out);
  animation: floatKw 6s ease-in-out infinite;
}
.reflection-cloud .kw:nth-child(3n)    { animation-delay: -1.5s; }
.reflection-cloud .kw:nth-child(3n+1)  { animation-delay: -3s; }
.reflection-cloud .kw:nth-child(3n+2)  { animation-delay: -4.5s; }
.reflection-cloud .kw:nth-child(odd)   { border-color: rgba(139,124,255,0.25); color: var(--accent-violet); }
.reflection-cloud .kw:nth-child(even)  { border-color: rgba(94,228,213,0.22); color: var(--accent-cyan); }
.reflection-cloud .kw:nth-child(5n)    { border-color: rgba(77,139,255,0.25); color: var(--accent-blue); }
.reflection-cloud .kw:hover {
  transform: translateY(-2px);
  background: rgba(255,255,255,0.05);
}
@keyframes floatKw {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}
.kw--lg  { font-size: 22px; padding: 12px 22px; }
.kw--md  { font-size: 18px; }
.kw--sm  { font-size: 15px; padding: 8px 14px; }

.reflection-quote {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-0);
  letter-spacing: -0.005em;
}
.reflection-quote::before {
  content: "";
  display: block;
  width: 40px; height: 1px;
  background: linear-gradient(90deg, var(--accent-violet), var(--accent-cyan));
  margin-bottom: 22px;
}
.reflection-quote em {
  font-style: normal;
  background: linear-gradient(90deg, var(--accent-violet), var(--accent-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ============== CLOSING ============== */
.closing {
  background: var(--bg-0);
  text-align: center;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 32px;
}
.closing-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(50% 40% at 50% 110%, var(--aurora-1), transparent 70%),
    radial-gradient(40% 30% at 80% 80%, var(--aurora-3), transparent 70%);
  opacity: 0.5;
  pointer-events: none;
}
.closing-horizon {
  position: absolute;
  left: 0; right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  box-shadow: 0 0 40px var(--accent-cyan);
  opacity: 0.6;
}
.closing .container { position: relative; z-index: 1; }
.closing-title {
  font-family: var(--font-display);
  font-size: clamp(48px, 7vw, 96px);
  font-weight: 400;
  line-height: 1.0;
  letter-spacing: -0.02em;
  color: var(--text-0);
  margin-bottom: 24px;
}
.closing-zh {
  font-family: var(--font-display);
  font-size: clamp(18px, 2vw, 24px);
  font-style: italic;
  color: var(--text-2);
  line-height: 1.6;
  max-width: 760px;
  margin: 0 auto 48px;
  white-space: pre-line;
}
.closing-actions {
  display: inline-flex;
  align-items: center;
  gap: 18px;
}
.closing-back {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--glass-stroke);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--text-1);
  transition: all 0.3s var(--ease-out);
}
.closing-back:hover { color: var(--text-0); border-color: var(--accent-cyan); transform: translateY(-2px); }
.closing-back svg { width: 14px; height: 14px; }
.closing-credit {
  margin-top: 64px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.20em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* ============== Utility ============== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}
.fade-in.in { opacity: 1; transform: none; }

.divider-glow {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
  margin: 0 auto;
  max-width: 280px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 168px;
  }
  .hero-qr {
    top: 76px;
    left: 50%;
    right: auto;
    width: 96px;
    padding: 6px;
    border-radius: 15px;
    transform: translateX(-50%);
  }
  .hero-qr:hover {
    transform: translateX(-50%) translateY(-2px);
  }
  .spotlight-card {
    min-height: 630px;
    padding: 34px 24px 28px;
  }
  .spotlight-takeaway { min-height: 230px; }
  .spotlight-next-text { min-height: 70px; }
}

@media (min-width: 881px) and (max-width: 1080px) {
  .spotlight-card { min-height: 470px; }
  .spotlight-takeaway { min-height: 146px; }
}

@media (max-width: 640px) {
  section { padding: 80px 20px; }
  .nav { padding: 16px 20px; }
  .nav.scrolled { padding: 12px 20px; }
}